Pension And Other Postretirement Benefit Plans (Funded Status In Consolidated Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Mar. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Non-current liability (reported as pensions and other postretirement benefits)	$ (140,529)	$ (102,858)
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Non-current asset (reported in other noncurrent assets)	1,424	1,493
Current liability (included in accounts payable and accrued expenses)	(6,511)	(2,098)
Non-current liability (reported as pensions and other postretirement benefits)	(98,020)	(65,765)
Amounts recognized in the consolidated balance sheets	(103,107)	(66,370)
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Non-current asset (reported in other noncurrent assets)	0	0
Current liability (included in accounts payable and accrued expenses)	(3,213)	(3,511)
Non-current liability (reported as pensions and other postretirement benefits)	(42,509)	(37,093)
Amounts recognized in the consolidated balance sheets	$ (45,722)	$ (40,604)